Willis n



(No Model.)

, W. N. GRAVES.

BRICK KILN.

Patented Peb.' 26., 1884.

.i /,/////////////%////.///////W\ a wasn N. PETERS. Fhuxc'ul Ihvrrnn STATES ATENT Fries.;

WILLIS N. GRAVES, `OF ST. LOUIS, MISSOURI, ASSIGNOR OF ONE-HALF TO THE HYDRAULIC PRESS BRICKCOMPANY, OF SAME PLACE..

BRICK-KILN.

SPECIFICATION forming part of Letters Patent No. 294,223, dated February 26, 1884.

Application tiled February 12, 1883. (No model.)

My invention relates to a kiln having an.

open floor, as fully described hereinafter, and pointed out in the claims.

Referring to the drawings, A represents the brick-chamber and B the furnaces, a suitable number being on each side of the kiln. C represents the perforated floor of the kiln-chamber, beneath which are iiues D, communicating with the fire chambers through small openings, E, made by building up walls F in the i'iues. The fire-chambers B also communicate with the upper portion of the kilnchamber by side fiues or pockets, G, extending upwardly to near thc top of the chamber. Extending extirely across the kiln-chamber is a flue, H, of sufficient height to locate its mouth'in a central position between the sides and top and bottom of the chamber. This iiue extends down through the floor of the kiln and the ilues D, as shown plainly in Fig. l, thus dividing this part of the kiln, and it communicates with the chimney I. I have said that this flue extends entirely across the kiln-chamber, and it does in my preferred form; but I do not wish to confine myself to extending it entirely across, for it may be made in sections with closed ends, or the single iue may not extend quite all the Way across. Now, it will be'seen that vthe only course there is for the products of combustion to take from the kiln-chamber to the chimney is through the iiue H, and thus the products of combustion passing through the flues D, beneath the floor,

and th rough the licor, must ascend through the mass of bricks, as shown by the arrows in Fig. l, before they can escape, and the products passing to the top of the kiln-chamber by way of the fines G have to descend through the mass of bricks, as shown by the arrows, same iigure, to escape.

Thus from the time the fires are started until the burning is completed simultaneous up-and-down drafts are had through the bricks, which in practice have As the shortest course is through the bottom of the kiln-chamber, it will be understood that the amount of draft in either direction can to a great extent be controlled by increasing or diminishing the size of the openingsE by adding to or removing bricks from the tops of the walls F.

I claim as my inventionl. The process of burning bricks in a kilnchamber, .which consists in drawing the products of combustion from the top and bottom to the center of the chamber, as set forth.

2. A brick-kiln having means to draw the products of combustion simultaneously from the top and bottom to the central portion of the chamber, as set forth.

3. A brick-kiln in which the products of combustion attack the contents of the chamber from the top and bottom of chamber simultaneously, and pass out through the central `portion of the contents, as set forth.

4. A brick-kiln having an exit-flue whose mouth is located at the central portion of the main chamber between the top and bottom and sides, asset forth.

5. In a brick-kiln, the combination of a main chamber having vertical side fines extending to near the top thereof, and a perforated floor to admit the products of combustion, and a central ilue having its mouth located between the top and bottom and sides of the chamber, as set forth.

6. In a brick-kiln, the combination of a main chamber having a perforated iioor, firechambers on each side of the main chamber, vertical flues on each side of the main chamber, forming a communication between the nre-chambers and the top of the vmain chamber, horizontal flues beneath the perforated floor, communicating with the fire-chambers, and a centralilue extending up into the body of the main chamber and in communication with the chimney, as set forth.

7. In a brick-kiln, the combination, with the main chamber having a perforated floor,

'of the fire-chambers `located on each side, a

-been found -to give most satisfactory results.

central iue extending into the body of the chamber to forni the exit for the products of Combustion, vertical and horizontal lines earrying the products of combustion to the top 5 and floor ofthe chamber, and Walls built up in the horizontal lues to regulate the amount of draft therethrough, as set forth.

8. In a brick-kiln, the combination of main Witnesses:

chamber A, vertical side fines, G, extending` SAML. KNIGHT,

ro to near the top thereof, reehanibers B on GEO. H. KNIGHT.

eaeh side, perforated loor C to the main ehaniber, horizontal iues D beneath the door, having openings E, formed by Walls F, central flue, I-I, extending up into the body of the main chamber, and the ehimneyl, as set forth. 15

VILLS N. GRAVES. 

